Conference Proceedings

The impact of breeding to reduce residual feed intake on enteric methane emissions from the Australian beef industry

AR Alford, RS Hegarty, PF Parnell, OJ Cacho, RM Herd, GR Griffith

Australian Journal of Experimental Agriculture | Published : 2006

Abstract

The expected reduction in methane emissions from the Australian beef herd resulting from using bulls identified as being more feed efficient as a result of having a lower residual feed intake (RFI) was modelled, both in a single herd in southern Australia and in the national herd. A gene flow model was developed to simulate the spread of improved RFI genes through a breeding herd over 25 years, from 2002 to 2026. Based on the estimated gene flow, the voluntary feed intakes were revised annually for all beef classes using livestock populations taken from the Australian National Greenhouse Gas Inventory (NGGI). Changes in emissions (kg methane/animal.year) associated with the reduction in feed..

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University of Melbourne Researchers

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